Add relevant lines count and tested lines count to html report

[SiemianHS]

Background story

In the project where multiple modules are created, having just the code coverage percentage per module is not enough information to calculate the overall code coverage for the whole project. Additional information about total number of lines and total number of lines tested is required.

PR description

In this PR additional data regarding total number of lines and total number of lines tested is added to html report.

Screen shot

[coveralls]

Coverage increased (+0.02%) to 96.253% when pulling 2c6066c on SiemianHS:master into 9f35596 on SlatherOrg:master.

[ksuther]

Thanks for the PR! Since this is showing the count for Total Coverage, would it make more sense to put the line count on the same line as Total Coverage?

For example, something like:

Total Coverage : 94.37% (218 of 231 lines)

[SiemianHS]

Why i have not thought of that? 🤔
Great suggestion, thanks @ksuther. I will apply it.

[SiemianHS]

Updated according to your suggestion @ksuther, thank you for it and for all the hard work on Slather.

[ksuther]

Thanks for the change! The bad news is you flipped the order of the variables. It should be 218 of 231 :)

[SiemianHS]

Shame on me, looks like i had some kind of brain fart when writing this. Thanks for spotting the issue. Now it's fixed.

[ksuther]

Thanks for the PR!